Electric bell.



A. A. ZIEGLBR.

ELECTRIC BELL.

APPLICATION IILED MAR. 20, 1910 Patented July 2, 1912.

g wzfi MZZTGLSSGS.

, UNITED STATES PATENT OFFICE.

ALFRED'A. ZIEGLER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED ELECTRIC APPARATUS COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

ELECTRIC BELL.

Specification of Letters-Patent.

Patented July 2, 1912.

To all whom it may concern.

Be it known that I, ALFRED A. ZIEGLER, Boston, county of Sufi'olk, State of Massa ,chusetts, have invented an Improvement in Electric Bells, of which the following is a specification.

This invention relates to electric-bells, and

- has for its object to provide an electric-bell with heavily constructed and substantially durable parts, whereby it is adapted to withstand severe usage, and the parts of WhlCh may be easily removed forpurpos es of re- .air, and all the parts may be lnsulated iiom the base or frame, whereby the current is not permitted or required to pass through said base or frame.

My 1nvent1on involves improvements in the construction of the var1ous.parts, as wlll be hereinafter described.

Figure 1 is a front view of an electric-bell embodying this invention, F1g. 2 1s a vertical section of the bell as shown in Fig. 1,

- taken on the dotted line 2-2, Fig. 3 is a with the armature-lever.

a represents the base-plate or frame, which is made of any suitable shape and material;

- b the electro-magnet, which is supported on an ear a, projecting forward from the baseplate, and. c the armature, which is secured to the newlyformed armature lever c. 'A

late of brass b or equivalent material, is interposed between the heel-piece b and the ear a to magnetically insulate the electro magnet from the frame, and the armature is likewise magnetically insulated by the ar mature-lever being made of brass or equivalent material. J

The armature-lever, see Fig. 5, is made as a bar, formed by casting or otherwise. It

has at its upper end a perforated ear 0*,

through which a pivot-pin 0 projects, which extends a short distance at opposite sides of the ear, and is formed with conical ends. It

1 other end of the also has an ear 0 formed with hooked end to which one end of a tension-spring d. is connected. It also has a boss 0 formed with a flat face, to which the upper end of a spring-arm 0 is attached by screws'or otherwise, said boss 0 providing for supporting the spring-arm, which is made flat and without a bend, with its lower end-portion free from contact with the bar. It has a recess at one side extending nearly throughout its length, which receives the armature 0, and said armature is secured to the bar by screws or otherwise.- It has a boss 0 at its lower end, which is provided wit-h a screwthreaded hole extending through it and opening into the recess for the armature,

which receives the screw-threaded end-portion of an arm e, bearing the bell-hammer e. The upper end of the arm e is formed with a flat side 6 see Fig. 9, which extends over the armat-ure'c, so that, when said armature is secured to the bar, said arm is held from turning. The spring-arm 0 has its lower end a contact-plate 0 which, asthe arm is moved, engages and disengages the end of a contact-screw f.

The pivot pin a is mounted in a sup orting-frame, which is attached to, but insulated from, the base a. Said supportingframe, see Fig. 6, comprises a yoke g, having a step for one end of the pivot-pin formed in one of its arms g, and having a pivot-screw 9 with a socketed end. for the ivot-pin mounted in its other arm g. .Sa1d pivot-screw is adjustable, and is held in difierent ositions by a check-nut g. An ear g is ormed on the yoke 9, adapted to receive'a screw g, which engages one end of a circuit-wire g and the spring-arm 0 has an ear 0 which extends over the edge of the armature-lever, and a screw 9 extends through said ear, which engages the "other end of said circuit-wire.

The spring-arm is thus electrically connectcd with the supporting-frame, so as to insure a path for the current without relying upon the pivotal connection, which is uncertain.

The tension-spring d, which is attached at.

one end to the ear 0, is attached at its 0 posite end to a screw 03', passing entirey through a hole in a post (i and said screw has a check-nut d mounted on it to hold it in fixed position, and has also a laterally-j extended pin 03*, see Fig. 7, which enters a key-way in-the hole through thepost, to

thereby prevent it .from turn ng. The post d is formed as an integral part of the supporting-frame for the armature-lever, being connected by a bar 9 One of the magnetwires, as i, is attached to the supportingframe of the-armature-lever, as, for instance,

to the bar 9 by a screw 1;. The other magnet-wire i is connected with a binding-post j, which is secured to, but insulated from the base-plate. The body of the binding post has anear 7" extended from it,to which said magnet Wire is connected by a screw "f To secure the binding-post to the base plate said base-plate is formed with recesses in its front andback sides,vsee Fig. 4, made concentric with a hole which is. vformed through the base-plate, and bushings j, of

insulating-material, are placed in said recesses, and a'screw 7' extends through said bushings and throu h the hole in the baseplate and through-t e body of the binding-7 post, and its projecting screw-threaded end receives upon it a binding-nut j and a checknut 9', adapted to receive between them or between the binding-nut and the body of the post the leading-in wire. The base-plate is also formed'with a hole which receives a bushing 9' of insulating-material, which is formed with a hole'to receive a screw j which extends throu li the ear on the binding-post. Thus, bot the body of the post i from, the base-plate.

and the ear are insulated =from the baseprlate, and the binding-post is prevented om turning. The other parts are secured to the base-plate in the same manner, so as to be insulated therefrom. v I

The contact-screw f extends through a 0st f, which is connected to, but insulated mm, the base-plate and is inte ally con-f nected with the bod of -a bin mg-post is by a so that t e ost f is electrically connec with the bin ing-post la, and also is held from rotation on the baselate, there- 'by to insure the contact screw a ways occup ing a position in front of the-contactate a borne-by the resilient arm e s The inding-post Is 15 secured to, but insulated The base-plateis formed at its lower end i I with: an extension h? to receive a support for the gong h. A bolt h extends through a hole in said extension and through a sleeve It? and through a hole in the gong h, and receives upon its projecting en a nut h, and the head it ofsaid bolt is made square and occupies. a position between a air of flanges It on the back side of the ase-plate, to thereby kee it from turning. Said extension h is ma e long enough to provide for the attachment thereto of gongs of difi'erent sizes, and, as here shown, it has two holes for the attaching-bolt h.

.When assembling the device ongs of different sizes may be" selected, an also arms of diiferent lengths, which carry the bell-hammer, and, as they are both detachable, they maly be carried m stock'for immediate use;

1. An electric-bell having a base-plate, an electro-magnet, a pivoted armature-lever bearing a, bell-hammer and a resilient con tact-arm, a contact-screw adapted to be engaged by said "arm, a post through which said screw extends, a binding-post having a body and means to rigidly connect said 1 post bearing the contact-screw with the body of the-bind1i1g-post, thereby to prevent both posts from turning with respect to the baseplate and also to electrically, connect them togethensubstantially as described.

2, An electric-bell having a base-plate, an electro-magnet, a pivoted" armature lever bearing a bell-hammer, aresilient contactar n attached to said lever having an ear extended over the side of said lever, a supv screw adapted to be engaged by said resilient 7 arm, a 'post bearing said contact-screw, a bindingost integrally connected withthe aforesai postto' electrically connect them together and prevent them from turning, means'for attachin said' posts to but insulating them from t e base-plate, a support for the armature-lever, means to attach it to and insulate it from the base-plate, means attached .to the base-plate to prevent said support from turning another binding-post attached to but insu ated from the baseplate, means to hold said binding-post from turning, means for attachin one of the magnet-wires to the support or the armature-lever and the other magnet-wire to said last-nainedjbindingost,'and a circuit-wire connected at'one en to said support and at the other end to "said resilient contact-arm, substantially as described; 1 4; An armature lever having a recess for the armature and a boss provided with a hole extending through 'it opening into said recess, an armature'arranged in sa'drecess, a ammer-carrying arm held, in said hole ran projecting into said recess underthe armature, said arm having a flattened end portion which engages the armature, whereby the armature prevents the turning of said I am, substantially as described.

1,031,313 r a B 5. In an electric-bell, an armature-lever having a recess for the armature and having a boss at its lower end formed with a screwthreaded hole through it, opening into said 5 recess, a" hammer-carrying arm provided with a screw-threaded portion to enter said screw-threaded hole in said boss, and having a flattened portion extending under the armature whlch is contained in said' recess,

whereby it is attached to the lever-and held 10 from turning, substantiall as described.

In testimony whereof, have signed my; nameto this specification in the presence of two subscribing witnesses.

ALFRED A. ZIEGLER.

Witnesses:

B. J. Noyes, H. B. DAVIS. 

